There is some more information to that. There were two "original" batches of Terra, fast striking (which is what everyone loves) and the slower to strike Terra. DH, managed to recreate fast striking terra, which is a more stable variation of their original fast striking formula. You can find it on their website.
The amazing Kim Neely created this tutorial last year:
https://www.etsy.com/au/listing/9892...op_home_active
Which gives you insight into the history of the glass and how to work Terra. Best money I've ever spent on a tutorial, she is so giving with her knowledge. I remember seeing her early beads and just being floored at how she created them.
I have a batch of "original" Terra, but it was not the "fast striking" kind. I've shelved it in favour of the newer batches found on DH's website.